163281432 has 32 divisors (see below), whose sum is σ = 408541680. Its totient is φ = 54382080.

The previous prime is 163281427. The next prime is 163281463. The reversal of 163281432 is 234182361.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 163281432.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40132 + ... + 44012.

Almost surely, 2^163281432 is an apocalyptic number.

163281432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

163281432 is an abundant number, since it is smaller than the sum of its proper divisors (245260248).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

163281432 is a wasteful number, since it uses less digits than its factorization.

163281432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5643 (or 5639 counting only the distinct ones).

The product of its digits is 6912, while the sum is 30.

The square root of 163281432 is about 12778.1623091898. The cubic root of 163281432 is about 546.5697604022.

The spelling of 163281432 in words is "one hundred sixty-three million, two hundred eighty-one thousand, four hundred thirty-two".